This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A190883 #5 Mar 30 2012 18:57:29 %S A190883 2,6,10,14,19,23,27,31,35,36,40,44,48,52,57,61,65,69,74,78,82,86,91, %T A190883 95,99,103,107,108,112,116,120,124,129,133,137,141,146,150,154,158, %U A190883 163,167,171,175,179,180,184,188,192,196,201,205,209,213,218,222,226,230,235,239,243,247,251,252,256,260,264,268,273,277,281,285 %N A190883 Positions of 1 in A189480. %C A190883 A sequence in a 4-way partition of the natural numbers. See A189480. %t A190883 (See A189480.) %Y A190883 Cf. A189480. %K A190883 nonn %O A190883 1,1 %A A190883 _Clark Kimberling_, May 23 2011